In case Mariah Carey did not own enough jewels, she has been royally pampered with more. The Sultan of Brunei's son unexpectedly gave the diva singer $4 million of diamonds at one of her concerts last week.

The singer received an eight-carat, flawless diamond necklace and matching ring from Prince Azim just as she was about to go on stage in New York last Wednesday.

The 24-year-old prince is third in line to the Sultinate and his father is worth a whopping $32 billion.

His representative told Mariah, "We were sent by private jet to deliver this gift."

The singer was so delighted to be performing in her hometown that she splashed out $38,000 on Cristal champagne for friends and family at the show, which took place in Madison Square Gardens.

Mariah made sure her 150 guests enjoyed themselves, although she could only drink wine.

According to Britain's Daily Mirror newspaper, the 36-year old singer said, "Champagne's bad for my voice so I can't have any on tour. I am sleeping 15 hours a day in a room full of humidifiers and am on total voice rest between shows-I'm not even supposed to speak."

Mariah is currently on the U.S. leg of her "Adventures of Mimi" tour, but will begin filming her new movie and begin work on her new album at the end of the year.

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